Engineer&#39;s valve.



B. S. AIKMAN.

NGINEERS VALVE.

APPLICATION FILED MAB. 7, 1910.

Patented Nov. 25, 1913.

4 SHEETS*SHEET 1.

A arvney wf?- @MM B. S. AIKMAN.

ENGINEERS VALVE.

APPLICATION FILED MAR. 7, 1910.

1,079,9G9- Patented Nw. 25, 1913.

4 SHEETS-SHEET 2.

BLS. AIKMAN. ENGNEERS VALVE. APPLICATION FILED MAR. 7, 1910.

TQQ Patented Nov. 25', 1913.

4 SHEETS-SHEET 3.

B. S. AIKMAN.

ENGINEERS VALVE.

APPLICATION FILED MAR. 7, 1910.

1,079,909, v Patented Nov. 25, 1913.

4 SHEETS-SHEET 4.

mn/555 65 I j@ vemo?" d m Ba/fa@ i A v'mfzf Y Y A A JM? y A o f77/gy@UNITED STATES PATENT oEE1oE.

BURTON S. AIKMAN, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO NATIONAL BRAKE- &

yELECTRIC C OQOF' MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ENGINEEES VALVE.

C To all whom #mag/ concern ,Be it. knownthat I, BURTON' S. AIKuAN, alcitizen ofthe,United` States, residing at `Chicago, in thejcounty of 4Cook and State of Illinois, have invented a certain new and usefulImprovement in Engineers Valves, of' which the following is a full,clear, concise, and exact description, reference `'beinghadtothe-acconipanying drawings, forming loa part of this specification.f

invention relatesto engineers valves, and `has special reference ,to aform of .valve `.adapted to be used in'connection with fluid pressurebakesysteins. f

v Inthe so-called straight-airmethod ofap- .plying brakes,fitiswellknown thatthe engineersv valve servesto establish connection between the-mainreservoir and brake -pipe when the brakes fare applied and be-latmosphere when tween the brake pip-.eand

it Vis desired to release tliebrakes.

It isfone' of 'themobjects of my invntion to acco-lnplishthis result ina simple manner by the use of a ,device which is economical .toconstruct and eiicient in'loperat-ion.

`Whenthe vfluid pressiire brake system operates in .the so-calledautomatic inan- ..n er,vby means offwhich the brakes are ap- -plie.dbyestablishing Vconneeti on between the SOnauXilia-ry reservoir `and'brakecylinder vand released by exhausting from a cylinder pipe to ,theatmosphere,` my improvedt'orn of engineers valve can similarly be used,itbe- ,ing necessary merely toconnect thecylinder jpipe to theeiig'ineers valve in' the manner in ...which the brake pipe wasvconnected in the vlvstr aigfl'it-air system, and toconn'ect the brake-pipe Where the connection was made with the main reservoir. 40. For thesake of simplicity Lwilljdescribc my.v invention used in the,straight-air `s vstennit beingalways understood that if it is.used inconnection with an automatic brake system the connections can be made asjuf-'t described. w i. f

f Itis a further objectof my invention to provide `means bywhiclithepressure in one ofv the chambers -ofthefva-lve` will always bemaintained at-'thepressure vof the main reservoir hen the brakesarclbeing applied. so that wit-.ien connect-ion is niadewith the brake pipeair 'will .immediately flow into the'same las desired Lind. according tothe` cross-sectional area ot t opcninciwhich is t'ornicfl.

Specification of Letters Patent. Application filed March 7, 1910. SerialNo. 547,888.

Patented/Nomea 1913.

connection between the.. abovel 'mentioned chamber and the mam reservoirbeforeiconnection 1s established ybetween the saine vchamber andrthelbrake..,pipe. Conversely gwhen connectionI 1s broken the'openingbetweenthe vchamber and thebrakepipeis first closed, andlater, the.V connectionbe-' tween the main reservoirand the chamber is closed, thns leaving-the.pressure in`,the chamber the sameas that4 intln4 mainA reservoir. Onvthe other hand, 1when. it is-desired toconnect the brake, 'pipe withatmospliere,.V

communication between the malinresemioir and the. above mentionedchamber. is-cut: oil' by means of a suitable automatically operatedvalve, and the air; in this chamber passes through a valve whiclrisx no'w opened` into a second chamber, frourwhich it iseX- 'A haus'ted tothe atmosphere, the connect-ion beingl vfirst established.between thebrake pipe and theI iirst chamber, anch-subsequently, between saidlchamber and the. "passages which lead to, the:atmosphereA In this caseit will be observed that'the pressurein the chamber willY remain thesame as'that in the brake pipe, ,and in this-way ari-irregular exhaustis prevented, which would .take

place it', for example, the connection with atmosphere 4wereesta'bllshed before connection .with the brake pipe'. After the `brakesvh avebecn releasedfand itv is desired vto make anew appl1cat1on,;thepressure in1 the chain-1,;I

ber will beagain raisedto,. that ofthe main .reservoirbetereconnection-is made with the brake pipe in the manner which hasalready been described. l

These andV other advantages of. my inven#` tion will bemoreaplmrent.by'.reterence'to the accompanying drawingsini w-hiclr-I 1Figure l is a fro-nt elevatioufof tihe-engineers valve; :Figy islavertical :longitudinal section. through: theivalve, showing certainyparts inelevationfand. `with the valve handle in. position ;A Fig. 3isa plan' View ot' the lower portionot' 4the-valve casiiiexwthe upperportion. ot' lthisl casing-and all operatin .i -parts being' removed--rFig. JC is a' tr: isf verse sectional y,view .tlii' nigl1.tlie upperchamber of the fengint-:cfs vfalvelsliowing the spindle and pa-rt i thecmmecting.valve in position; Fig'. 5. is'a transverse sectional and'partly plan vica' .showingy the vspindle 1 and operating parts:isscciated witli-.thc lower connectingy valve, these 'parts beingiu 55'This result i.-` 'acmainflislicfi by establishing 'the position whichtl1e\"wc1i-hl assunte when the parts in Fig. 4 are in the positionshown; Fig. 6 is a partly sectional and plan f view of the slide valvein the lower valve chamberyll ig. 7 is a side elevation of one of theconnecting valves; and F ig. 8l is an end elevation of the connectingvalve shown in Fig. 7.

The main valve casing consists of a lower portion. 1 and an upperportion 2, in which are the chambers 3 and 4, respectively. Mounted onthe upper part of the portion 2 `is the shield member 5, which, as shownin `Fig.` 1, is open in front. Within this shield member is the rotatingcollar 6, which is integral `with the engineers handle 7. Within thehandle 7 is the rod 8, normally held in engagement with a slot on thelocking strip 9 on the casing 2'by means of the spring 10. Rigidlyattached to the rotatable collar 6 is t-he spindle 11, which passesdownwardly through the Icasing 2, the chamber 4 and the chamber 3,engaging at its lower end the rotatable slide valve 12. In order toprevent the passage of fluid from chamberv 3 to chamber 4 the spindle 11is provided with the collar 13, thegasket 14 being placed between theportions 1 and 2 of the main casing. As shown in Fig. 6, the lower endof the spindle 11 is triangularly shaped in order` to engage thecrosslnembers 15, 15 of the slide Valve 12. A 'recess .16 is formedwithin the endof the spindle 11, and a spring 17 is engaged against oneend of this recess and on the other end engages the slide valve 12,thereby serving to ho-ld it firmly seated against the bottom of chamber3. Theslide valve 12 is provided with a round projecting lug 18 in itscentral portion vhich engages the recess 19 in the casing 1, and servesto hold the valve -12 and the spindle 11 in a central position.Projecting downwardly from the portion 1 ofthe main `casing are the`pipe members 2O and 21, which are adapted for connection with the brakepipeand a pipe in direct communication with the main res ervoir by meansofthe coupling members 22 andz23.

Connected with pipe member 20 is the passage 24 whichterminates in port25,

this port Abeing provided with notch 26, as 1 shown in Fig.` 3.yConnected with the pipe ,member 21 is the passage 27, which is in directcommunication with the valve chamber 28. This yvalve chamber is rovidedwith a bushing 29, within which t e. valve A 30 is adapted t0 beoperated, this valve being` provided with packing 31, adapted to beseated onthe seat 32 to break communication between chambers 33 and. 28.The valve 30 is also provided with grooves 34', as shown in Figs.`7 and8, thus affording free communication betv. een all parts of chamber 28.Passing through the open-` ing 34 of the valve 30 is the Valve stem 35,

and between the shoulder 36, of said stem and the nut 37 the valve 30 issecurely clamped. The valve chamber 28 is closed at its outer portion bymeans of the nut 38, within which is the recess 39into which the spring40 `fits, the other end of this spring having its bearing against thenut 37 and -serving to normally hold the valve seated" against itsn'seat32. The upper portion 2 of the main casing is similarly provided with avalve,` 41, which is similar to valve 30 of the lower casing. This valveoperates .within chamber- 42, which is closed by nut stem 43. Valve 41is provided with valve 44, similar to valve stem 35.

side of chamber4 has an opening 45 which is closed by the plate46,heldin position by* screws 47.` Inte ral with the plate 46 is thebracket 48 to vw ich the lever 49 is pivotally attached. The .spindle 11is provided with a recess 50, into. which the lever 49 is adapted tofit. `This recess has twoy straight i sides 51 and-52 which meet at anangle.v It 9o is evident that whenv the lever 49 .is within the recess50, as shown'in Fig. V4, the valve 41 will remain seated,`but ifthespindle 11 lever 49 would be forced to the right -and the valve V41would be unseated from its seat 53, and communicationwould' beestablished between chambers 42 and 54. .Onthe and 52 of the recess 50are in the position shown in Fig. 4, the sides 57 and 58 of` the recess56 are in the position shown in Fig. 5. It is thus evident that 'if thespindle 11 were rotated in a clockwise direction the lever 49 would bemoved to the right, whereas, the leverv 55 would be unaffected, whereason the other hand, 4if the lever were rotated in 4a counter-clockwisedirection the lever 55 would be moved to the ri ht, whereas, the lever49 would be unaffected.

As shown in Figs.- 2 and, a port 59 leads from the bottom of chamber 3,this port being provided with anotch 60. Port 59 communicates withpassage 61, which passes upwardly through the portion 1 of the maincasing, and, as' shown in Figs. 2 and 4, continues through portion 2 ofthe main casing and then passes within the wall of the casywere rotatedina clockwise'direction the The portion 1 of the main casing is pro- 80As 1s most clearly shown 1n Fig. 4, the ,p f

vided with a boss G2, through which isthef threaded passage 63 adaptedfor connection with.

11 h', d'iii a loi `1"c" 11la"r direction'through `the Wall i ortionl"aiidopiens 'into chamber 4f portion??Ofjjthe main-easing;

'uSje'he fact that each of' thefp'orts d oisjpro'vided With a noth, asaho've 12de" actuated to', aford a pneu- 35i-'50, "1111151551015 'thSpnfll lllnddhe-iyalve 30' will remain seatediff'lhe slidef simulta'neouslk Ve is'nioved so thatjpfofrt 5 9 is un'oovf red and 'the airin chamber 3 flows thfru gli 60 iiiclifas the val'v'lll remains seatedthis t "is" 'evident vthat wheneierltlie ma@ efrieceionihmug1ieither f;Said hat the 'omin'unicating passage" of 'd' p'ort 4forms part, isVgradually "alvjef 12 opens `the rport Inasnuoh fas I provide s30` and4l, are Lserizilb(l disposed he' 'main reservoirlfto the brake pipeiwhich leads to the brake pipe. Thus, aff-ter the first application ofthe brakes the chamsage' if( :with at n. Giangi" i ex' notch 26 in the'port 25. It is evident that manychanges could be made in the detailconstructionl of the valve which I have described without departing fromthe spirit of my invention.

What I claim is:

1. yIn an engineers valve, the combination of a main casing having inletand outlet openings, a valve between said openings, a spindlepassingthrough said casing, and aseparately pivoted lever operated by themovement of said spindle, 'said lever adaptedy to, unseat said valve,thereby establishing communication between said openings.

2. AIn an engineers valve, the combination oi' amain casing having inletand outlet openings and an exhaust passage, a valve between said inletand outlet openings, a second valve between said outlet opening and saidexhaust passage, amanually operated spindle passing .through said maincasing,` and a separately pivoted lever associated with each of saidvalves, said leversbeing selectively operated by rotation of thespindle, each of said levers adapted to unseat its associated valve,thereby establishing connection between said inlet and outlet openingsor between said outlet opening and the exhaust passage. l

3. In an engineers valve, the combination of a main casing having inletand outlet openings, an exhaust passage, a chamber between theinlet andoutlet openings anda secondchamber between the outlet opening andtheexhaust passage, a valve in each of said chambers, a spindle passingthrough saidl casing, suitably disposed recesses in said spindle and alever associated with each valve and engaging in said recesses, rotationof said spindle adapted to selectively operate one of said valves,thereby establishing communication between said inlet and outletopenings or between said outlet opening and said exhaust passage.

4. In an engineers valve, the combination of a main casing having inletand outlet openings, an exhaust passage, a chamber between saidinlet andoutlet openings and a second chamber communicating with said firstchamber, a valve bet-Ween said inlet opening and said first chamber, avalve be- `tween said first and second chambers, a spindle passingthrough said casing, and a lever associated with each of said valves,rotation openings, an exhaustpassage, a first cham# ber between sa1dinlet opening and said out` let opening and a second chamber betweensaid first chamber and said exhaust passage,

a spring controlled valve betweenl said inlet opening and the firstchamber, a second spring controlled valve between the first chamber andthe second chamber, a rotatable spindle passing through said casing,suitably disposed recesses in said spindle and a lever associated witheach valve,each of said levers engaging a recess in said spindle andadapted to be operated by the rotation of said spindle to selectivelyunseat either of said spring controlled valves.'`

6. In an engineers valve,`the combination of a main casing having afirst chamber therein, an inlet and outlet opening communicating withsaid first chamber, a second chamber communicating with said firstchamber, andan exhaust passage communieating withA said second chamber,a spring controlled valve between said inlet opening and said firstchamber, a spring controlled valve between lsaid first chamber and saidsecond chamber, a spindle passing through said casing, a rotatable slidevalve operated by said spindle, said slide valve adapted to 'interruptcommunication between said first chamber and said outlet opening andbetween said first chamber and said second chamber, and a leverassociated w1t-h each of said spring controlled valves. suit-ablydisposed angular recesses in said spindle, said levers adapted to engageangularrecesses in said spindle to selectively cause unseating of eitherof said valves on rotation of said spindle.

7. In an engineers valve, a main casing having a chamber therein, inletand outlet openings in communication with said chamber, a second chambercommunicating with said firstchamber and an exhaust passage, a spindlepassing through said casing, and a rotatable slide valve operated bysaid spindle, said slide valve adapted to establish communicationbetween `said first chamber and said outlet opening and between saidfirst chamber and said.` second chamber.

,8. In an engineers valve, a main casing having a chamber therein, inletand outlet openings in communication with said chamber, a second chambercommunicating with said first chamber and an exhaust passage, al spindlepassing through said casing, and a rotatable slide valve adapted, whenrotated in one direction, to establish communication between said firstchamber and said second chamber in advance of establishing communicationbetween said first chamber and said valve between said port openings, aValve between one of said port openings and the exhaust passage, aspindle passing Nthrough said easing, suitably disposed recesses in saidspindle and a lever associated with each valve and engaging in one ofsaid recesses, rotation of said spindle adapted to selectively operateone of said valves, thereby establishing communication between one otsaid port openings and said exhaust passage.

l0. In an engineers Valve, the combination-of a main casing having anopening, a valve controlling said opening, a spindle passing throughsaid casing, suitably disposed recesses in said spindle and a leverassociated with said valve and engaging said recesses, rotation of saidspindle adapted to operate said valve.

l1. In an engineers valve, the combination of a casing having inlet andoutlet openings, a valve between said openings, a spindle passingthrough said easing, a cam on the lower end of said spindle, and aseparately mounted member engaging said cam and operated by the movementof said spindle, said member adapted to unseat said valve, therebyestablishing communication between said openings.

ings, a valve between said openings, a spindle mounted in said easingand operable from the outside, said spindle. having a recess, and aseparately mounted member engaging in said recess and adapted to unseatsaid valve, whereby communication is established between said openings.

13. In an engineer`s valve the combination of a main casing havinginletand outlet openings and an exhaust if issage, a valve between saidinletand oui t openings, a second valve between said outlet opening andsaid exhaust passage, a manually operated member passing into saidcasing and a separately mounted member associated with each of saidvalves, said separately mounted members being selectively operated bythe operation ot' said operating member, each of said separately mountedmembers adapted to unseat itsl associated valve, thereby establishingconnection between said inlet and outlet openings or between said outletopening and the exhaust passage.

In witness whereof, I hereunto subscribe my name this 4th day of March,A. D. 1910.

BURTOT S. AIKMAN.

iVitnesses:

ALBERT C. BELL, ROBERT F. BRACKE.

Gopies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

